根据句意和汉语或首字母提示，填写恰当的单词。

1. The pretty girl gave me a ________( 讨人喜欢的) smile.

2. I can't stand the terrible smoke that cigarettes _________(产生).

3. Very little of the house _________(遗留) after the earthquake.

4. Don't add salt to the dish. It's s         enough.

5. The ice will soon change into water if you h__________ it.

偿还期在1年以上10年以下的国债被称为（　　）。

A． 短期国债

B．中期国债

C． 长期国债

D．无期国债